/*
 *  Licensed to the Apache Software Foundation (ASF) under one
 *  or more contributor license agreements.  See the NOTICE file
 *  distributed with this work for additional information
 *  regarding copyright ownership.  The ASF licenses this file
 *  to you under the Apache License, Version 2.0 (the
 *  "License"); you may not use this file except in compliance
 *  with the License.  You may obtain a copy of the License at
 *  
 *    http://www.apache.org/licenses/LICENSE-2.0
 *  
 *  Unless required by applicable law or agreed to in writing,
 *  software distributed under the License is distributed on an
 *  "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 *  KIND, either express or implied.  See the License for the
 *  specific language governing permissions and limitations
 *  under the License. 
 *  
 */
package org.apache.mina.example.httpserver.stream;

import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.OutputStream;
import java.io.OutputStreamWriter;
import java.io.PrintWriter;
import java.util.Iterator;
import java.util.Map;
import java.util.TreeMap;
import java.util.Map.Entry;

import org.apache.mina.common.IoSession;
import org.apache.mina.handler.StreamIoHandler;

/**
 * A simplistic HTTP protocol handler that replies back the URL and headers
 * which a client requested.
 * 
 * @author The Apache Directory Project (mina-dev@directory.apache.org)
 * @version $Rev$, $Date$
 */
public class HttpProtocolHandler extends StreamIoHandler {
    protected void processStreamIo(IoSession session, InputStream in,
            OutputStream out) {
        // You *MUST* execute stream I/O logic in a separate thread.
        new Worker(in, out).start();
    }

    private static class Worker extends Thread {
        private final InputStream in;

        private final OutputStream out;

        public Worker(InputStream in, OutputStream out) {
            setDaemon(true);
            this.in = in;
            this.out = out;
        }

        public void run() {
            String url;
            Map headers = new TreeMap();
            BufferedReader in = new BufferedReader(new InputStreamReader(
                    this.in));
            PrintWriter out = new PrintWriter(new BufferedWriter(
                    new OutputStreamWriter(this.out)));

            try {
                // Get request URL.
                url = in.readLine().split(" ")[1];

                // Read header
                String line;
                while ((line = in.readLine()) != null && !line.equals("")) {
                    String[] tokens = line.split(": ");
                    headers.put(tokens[0], tokens[1]);
                }

                // Write header
                out.println("HTTP/1.0 200 OK");
                out.println("Content-Type: text/html");
                out.println("Server: MINA Example");
                out.println();

                // Write content
                out.println("<html><head></head><body>");
                out.println("<h3>Request Summary for: " + url + "</h3>");
                out
                        .println("<table border=\"1\"><tr><th>Key</th><th>Value</th></tr>");

                Iterator it = headers.entrySet().iterator();
                while (it.hasNext()) {
                    Entry e = (Entry) it.next();
                    out.println("<tr><td>" + e.getKey() + "</td><td>"
                            + e.getValue() + "</td></tr>");
                }

                out.println("</table>");

                for (int i = 0; i < 1024; i++) {
                    out.println("this is line: " + i + "<br/>");
                }

                out.println("</body></html>");
            } catch (Exception e) {
                e.printStackTrace();
            } finally {
                out.flush();
                out.close();
                try {
                    in.close();
                } catch (IOException e) {
                }
            }
        }
    }
}
